3M Post And Core Solution RelyX Fiber Post 3D Glass Fiber Post

Technical Data Sheet3M post and core solution3M RelyX Fiber Post 3DGlass Fiber Post

23M post and core solutionIntroduction3M post and core solution.Featuring 3M RelyX Fiber PostThe 3M post and core solution stands for a simplified but robust procedure with reliable, predictable outcomes –requiring only four clinically proven products and significantly fewer work steps:3M Filtek One Bulk Fill RestorativeExcellent material and handling characteristics make Filtek One Bulk Fill Restorativea great choice of core build-up material. With one-step increments up to 5mm, corebuild-ups can be done faster and easier.3M Scotchbond Universal Adhesiveprovides a strong bond of the core build-up material to post and tooth structure.In one easy application – with no need for an additional primer.3M RelyX Fiber Post 3D Glass Fiber Post’scoronal 3D macro retention ensure a secure bond to the corebuild-up. Together with 3M RelyX Unicem 2 Automix Cementits microporous surface also offers excellent bond strengthin the root canal.3M RelyX Unicem 2 AutomixSelf-Adhesive Resin Cementnot only offers high bond strength but also saves precious time,as pretreatment is not required. The automix syringe togetherwith the endo tip are designed to apply the cement directlyinto the root canal, reducing the chance of air pockets and voids.

Technical Data Sheet3D Glass Fiber Post.43M Filtek One33M Scotchbond Universal23M RelyX Fiber Post 3D1Bulk Fill RestorativeAdhesiveGlass Fiber Post3M RelyX Unicem 2 AutomixSelf-Adhesive UniversalResin Cement3

43M post and core solutionProcedure steps and product descriptionsSelection of the postPOST3M RelyX Fiber Post 3D Glass Fiber Posts (and 3M RelyX FiberPosts) are radiopaque, translucent, glass fiber-reinforced composite posts.The next generation posts feature coronal 3D macro retention and superficialmicro-porosity which together ensure a strong bond from root to core.SizesAll glass fiber posts are available in four sizes*: 0, 1, 2, and 3. Color codes ensure an accurate match to the drills.Drills (available in five sizes including one universal drill) are the same for both types of 3M Oral Care posts and areused for removal of the root canal filling and preparation of the root canal.COMBINATION POST/DRILLPOST SIZE/COLOR CODE0/white1/yellow2/red3/blueUniversal drillUniversal drillUniversal drillUniversal drillDrill whiteDrill yellowDrill redDrill blueDIAMETER OF APICAL POST END (MM)0.600.700.800.90DIAMETER OF CORONAL POST END WITHOUTRETENTION (MM)1.101.301.601.902.86 (5 %)3.44 (6 %)4.58 (8 %)5.72 (10 %)20 mm20 mm20 mm20 mmREMOVAL OF THE ROOT FILLINGPREPARATION OF THE ROOT CANALTECHNICAL DATA POSTSTAPERLENGTHFig. 1: 3M RelyX Fiber Post 3D Glass Fiber Post sizes and technical data.* Not all sizes are available in all countries.Size 3Size 2Size 1Size 0Universal drill3M RelyX Fiber Post 3D Glass Fiber Post

5Technical Data SheetShape3M RelyX Fiber Post 3D and 3M RelyX Fiber Post Glass Fiber Posts have both a tapered shape: They areparallel-walled (cylindrical) at the coronal end and conical at the apical end. The coronal end of the cylindricalpart offers a large surface area for the adhesion of the core build-up material and the greatest material thicknessto withstand mastication forces.Moreover, the coronal area of the next generation post is also equipped with unique 3D macro retention rings that allowfor secure retention to the core build-up material. The area is partly flattened, enabling a safe grip with tweezers.The microporous surface of the conical end allows high mechanical retention for the cement and a strong bond to theroot canal.Coronal 3DmacroretentionFlattenedside ofcoronal areaSuperficialmicro-porosityat conical endCompositionRelyX Fiber Post 3D Glass Fiber Posts are made from highly radiopaqueglass fibers embedded into a composite resin matrix. For superiormechanical properties, the glass fibers have a parallel orientation andare distributed equally over the surface area (Fig. 2).In addition, the glass fibers are pre-tensioned for enhanced post stabilityduring the manufacturing process. A two-step manufacturing procedurethat includes chemical and thermal curing, assures virtually completecuring of the composite resin matrix.Due to their advantageous combination of mechanical and estheticproperties, RelyX Fiber Post 3D posts are ideally suited for highlyesthetic restorations.10 µmFig. 2: SEM image (magnification 2kx) of across-section of 3M RelyX Fiber Post 3DGlass Fiber Post. Glass fibers are depicted aswhite spots surrounded by a composite resinmatrix. Source: 3M Oral Care internal data.

3M post and core solutionRadiopacityBoth 3M RelyX Fiber Post 3D Glass Fiber Post and 3M RelyX Fiber Post Glass Fiber Posts are radiopaque. Theradiopacity of RelyX Fiber Post (size 2) equals 2.5 mm Al/mm. With the new fibers used in RelyX Fiber Post 3D, theradiopacity is further increased to 3.5 mm Al/mm (Fig. 3)1, i.e. RelyX Fiber Post 3D offers enhanced radiopacityenabling better post position control. These findings are also confirmed by Peez et al.23M RelyX Fiber Post 3D(3M Oral Care)3M RelyX Fiber Post(3M Oral Care)Rebilda (Voco)D.T. Light-Post Illusion X-RO (Bisco)High flexural strength [GPa]21.510.5ParaPost Taper Lux (Coltène)0FiberKleer 4X (Pentron)3M RelyX FRC Postec LuxaPost(Ivoclar Vivadent) (DMG America)3M RelyX 3M RelyX Postec PlusDT IllusionFRCPost RelyX Fiber Post Glass Fiber Posts comparedFiber Postto FiberPost 3DFiber PostFig. 3: Radiopacityof XRO3M SLRelyXFiber Post 3DRebildaand 3Mcompetitiveproducts.Source: THE DENTAL ADVISOR, Research Report Number 70 – June 2015.1with TC3M RelyX Fiber Post 3Dwithout TCFlexural strengthThe flexural strength of the post contributes to the overall stability of the restoration. The flexural strength of RelyX FiberPost 3D and also RelyX Fiber Post Glass Fiber Posts equals or exceeds that of competing products tested (Fig. 4).Thermocycling tests assess the long-term stability under simulated aging conditions. RelyX Fiber Post 3D and RelyXFiber Post show both high flexural strength values even after 10,000 thermocycles (Fig. 5) and thus meet one of the keyprerequisites for the longevity of restorations.Flexural strength [GPa]1.510.501.510.503M RelyX Fiber Post 3D3M RelyX Fiber PostDT IllusionXRO SLFRCPostec PlusRebildaPostFig. 4: One-point flexural strength testing of 3M RelyX Fiber Post(3D) Glass Fiber Posts and competitive endodontic posts. All postswith a similar diameter of 1.5 – 1.6 mm. Source: 3M Oral Care internaldata. Data available upon request. See last page for contact information.2Flexural strength [GPa]22Flexural strength [GPa]yX st 3D63M RelyX 3M RelyX Fiber Post 3DFiber Postbefore TC3M RelyX 3M RelyX Fiber Post 3D Fiber Postafter TCFig. 5: One-point flexural strength testing before and afterthermocycling (TC), 10,000 cycles, 5 C/55 C, dwell time 30 s,change time 8 s. Source: 3M Oral Care internal data. Data availableupon request. See last page for contact information.The higher the Young’s modulus of a material is, the less flexible it is. In contrast to posts made from metal alloys orceramics, the Young’s modulus of RelyX Fiber Post 3D is more similar to dentin.Due to the high Young’s modulus of metal and ceramics, failures with these posts mainly occur as a result of excessivestress on the dentin and, consequently, in a higher incidence of root fractures. With fiber posts, very little stress arisesduring use and the stress is evenly spread all along the root.3 The tapered shape in the apical area of RelyX Fiber Post 3Dand the shape congruency of the prepared canal and post further contribute to an even stress distribution.In addition to the biomechanical behavior, other advantageous properties of fiber posts in general have contributedto their rapid diffusion among clinicians. Fiber posts simplify the endodontic restoration procedure compared tothe use of metal cast posts by eliminating the laboratory step. If a retreatment is needed, fiber posts are relatively easyto remove with a rotary instrument. Moreover, fiber posts offer the most favorable esthetic properties for reproducingthe natural look of the restored tooth.41.510.50

7Technical Data SheetPost cementationCEMENT 3MRelyX Unicem 2 AutomixSelf-Adhesive Resin Cement provides a reliably high bondstrength – without pretreatment steps. The automix syringetogether with the endo tip enable a smart and void-freeapplication of the cement directly into the root canal. Generally, decementation at the cement/dentin interface is consideredto be the main cause of fiber post failures.³By eliminating the etching, priming and bonding steps, self-adhesiveresin cements simplify the cementation and they are a reliable androbust alternative for luting glass fiber posts. Due to the reduced numberof work steps, the procedure is less technique-sensitive and less proneto mistakes.⁵With RelyX Unicem 2 Automix Cement, dentists get the same high bondstrength to tooth structure6 as with adhesive resin cements but withsignificantly fewer steps required.Peez et al.2 investigated the bonding performance of RelyX Unicem 2 Automix Cement to RelyX Fiber Post 3D andcompared the data to a control group with an adhesive resin cement(RelyX Ultimate Adhesive Resin Cement, 3M Oral Care). Both the adhesive resin cement (RelyX Ultimate Cement)and the self-adhesive resin cement (RelyX Unicem 2 Automix Cement) showed consistently high bond strengthvalues with RelyX Fiber Post 3D (Fig. 6).In a clinical environment, RelyX Unicem 2 Automix Cement might be easier to use. Due to the micro roughness(Rz 10 4 μm) of the post surface (Fig. 7) and the excellent chemical compatibility of the resin componentsof RelyX Fiber Post 3D and RelyX Unicem 2 Automix Cement, no pretreatments of the post such as etching orsilanization are necessary.20Bond strength [MPa]181614121086420LCDC3M RelyX Unicem 2 AutomixSelf-Adhesive Resin CementLCDC3M RelyX UltimateAdhesive Resin CementFig. 6: Pull-off bond strength values of 3M RelyX Ultimate Adhesive Resin Cement and3M RelyX Unicem 2 Automix Cement in comparison. Both materials show sameperformance in light-cure (LC) and dark-cure (DC) mode. Source: Peez et al.2100 µmFig. 7: Surface of 3M RelyX Fiber Post 3DGlass Fiber Post (SEM, 200x magnification).Source: Peez et al.2

83M post and core solutionCore build-upADHESIVE 3MScotchbond Universal Adhesive provides a strong,reliable bond of the core build-up material to the post and tooth structure in oneapplication – with no need for an additional primer. To achieve a secure bond between the post and the composite corebuild-up material, it is sufficient to apply Scotchbond UniversalAdhesive to the post and the surrounding tooth structure once and afterremoval of any excess cement. A separate etching step is not required.This is because the chemistry of Scotchbond Universal Adhesive utilizesphosphorylated monomers in a water/ethanol-based solution thatprovides acidity and allows the adhesive to bond to dentin and enamelwithout the use of a separate phosphoric acid etching step. With a pHvalue of 2.7, it can be considered as a mild self-etch adhesive.Scotchbond Universal Adhesive uses three trusted and well-knownadhesion promoters in one formulation(VMS technology) and thus also bonds to restoration substrates like fiber posts: 3M Vitrebond Copolymer provides consistent bonding to dentin under varyingmoisture levels. MDP provides self-etching properties and high bond strength to zirconia, alumina,metals, and metal alloys. S ilane allows for chemical bonding to glass ceramic surfaces without using aseparate ceramic primer.